public void test()
        {
            sendoPage = new SenDoPage(getDriver());
            sendoPage.navigateToLoginPage();
            sendoPage.moveToNavbar();
            sendoPage.clickProductBranch();
            sendoPage.checkFreeShipCheckbox();
            sendoPage.chooseBestSeller();

            // get filtered list
            List <Product> itemList = sendoPage.getFilteredItemList();

            // show info
            Console.WriteLine("filtered: " + itemList.Count);
            foreach (Product item in itemList)
            {
                Console.WriteLine(item.showInfo());
            }
        }